Drying-kiln.



T., G. MORRIS.

DRYING KILN.

A PYLIGATION FILED MAY 11, 190B.

'Patented 00h. 20, 1908.

2 SHEETS-sum" 1.

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wtwwoeo THOMAS C. MORRIS, OF LITTLE' ROCK, ARKANSASV nRYING-KILN.

Specification of Letters 'atent.

Patented Oct. 20,l 1908.

Application'led May 11, 1908. Serial No. 432,218.

T o all faihom it may concern: L' Be it known that l, THOMAS C. Mouais, a

. 'citizen `of the United States, residing at Little Rock,.in the county of Pulaski and State of Arkansas, have invented certain new'and useful. lmprovements in Drying Kilns, ot' which the following is a. specification.

This invention appertains to that class of drying kilns which are designed particularly for drying various kinds of lumber, and involves advantageous improvements. the nature of which will be pointed out more fully jhereinat'ter.

For a liull understanding of the invention, i'ei'eiencens to be had to the following detail description and to the accompanying drawings, in which `l-.lligure ll is a vertical loi'igitudinal sec-- tional View showing a kiln constructed in accordancemfith the invention; Fig. 2 is a transverse'sectional view; Fig. t3 is a top plan view Fig-1l is a detail view bringing out more clear-ly the siipptnting hangers for the steam' pipes; Fig. 5 is a view embodying modified means for supporting the steam pipes.

'l`liroughout the following detail description and on the several figures oit' the drawings similar parts are refei'redto by like reference characters. l

Specifically describing the construction of the inventioin'and. referring to the drawings, the numeral l designates ythe side walls of the kiln, the nui'iieral 2 the rear wall, and the numeral 3 the ici-ont wall.

fl indicates the top ofthe kiln.

Supported loi'igitudiiially in the kiln are the rails 5 upon which the cars of lumber are vsupported when the lumber is being dried in the customary manner.

.The front wall of the 'kiln is provided with suitable doors (.3 which are adapted to be opened in the usual way when the cars of lumber are heilig moved into or out ol the kiln.

ln the practical qiiiliodinient of the present 'invention a plurality o'l' kilns will be ai'- lranged si'le by side but the detail construc- Lion oi: all of the. kilns being the saine, one

only will be described. i

The drying means eiiiployei'l iii this invention comprises an important. feature thereof, boing designed osilierially to increase the etti-` cionoy ot the kiln in drying lumber, and

iirtheiniore, to admit of controlling the de- -stantial manner.

gree of heat in the kiln more etfectively than is admissible in the various types of kilns at present most commonly in use.

Arranged beneath the rails 5 and extend- .,ing transversely acrossthe kiln at suitable intervals are a plurality of cross bars 7, made preferably from channel iron, the ends of which are seated in thewalls l of the kiln, the intermediate portions ot' which are connected with vertical I-beains 8 upon the upper ends oi which are supported and secured the rails The lower end of each beam 8 `is carried by-a suitable foundation 9 and at intervals certain of the beams are connected together by means of rods and turn-buckles for the purpose of rigidity.

Carried by the cross bars 7 are a plurality of hangers 1l in each of which are supported, a series of steam pipes 12. Each hanger l1 is composed of spaced plates connected at the upperends by a bolt 11, and a stirrup 13 receiving the adjacent cross bars 7 is connected with the upper' end of each hanger 11, attaching the same to the cross bar in a sub- Transv'erse bolts 1L]E eonneet the spaced. plates of each hanger 11, and the pipes 12 are supported upon the bolts 14 as shown more clearly in the drawings. F our series or sets of steam pipes l2 are 'pr'ei erably provided for each kiln and each set o'l' pipes is vertically arranged and inclines slightly downward toward the-rear wall 2 ol. the kiln. The rear ends of each set of pipes 12 a-re connected with a rear header 15 while the front ends of such set of devices are connected with a front header 1G.. Leading. from the lower end ot" each rear header l5 is a drain pipe 17 which is arranged substantially in vertical alineinent with the-adjacent set ot' steam pipes 12, and which extends through the Afront wall 2l of the kiln to a suitable point of discharge for the water of condensation finally passing to the header from the pipes 12.

Steam vis used a heating medium for the kiln and is admitted to each set of steam pipes 1Q from a steam supply pipe 1S having a suitable valve 19, whereby the steam supply may be cut` off when desired.' Leading from tlie steam supply pipe 18 iis an upa downwardly extending branch pipe 21, the

pipes 20 and 2 1 tor each steam supply pipe 18 being connected with one of the headers 1t and passing through the' front. wall ot the kiln for this purpose.v Suitable venti'- lating` lines 22 are provided in the walls of the kiln to permit the steam or .moisture :rising 'from the lumber as it dries to pass out ci the kiln.

In Fig. C is shown a modified form of siujiporting means ttor the various sets ot' steam pipes in the kiln. ln this construction the hangers 1l. are not employed, but spaced supporting plates 23 of said plates being seated in a suitable it'oundation oi concrete While the upper ends are attached to the cross bars 7. 'lf he plates however, are connected by the bolts 2l which perform the same function as the bolts 14, before described. in supporting the pipes 12 of the series carried by the plates or ineinbers i lt will be understood that any number ot series ot steai'n pipes may be arranged in each kiln, within the contemplation of the invention. rl"he practical disposition of the pipes l2 of each series is particularly advantageous because water et condensation in the feed or st 2am supply pipe 18 will pass to the lower cad o the :front header 16 by the b auch pipe il, and does not mix With the dry steam passing outwardly through the branch pipe 20 to the upper portion or'.' the header 1t. The `water ot condensation is thus separated from the dry steam..1 so to speak. as the steam is ted to each series of steam pipes 1&2 from the feed pipe 18 connected therewith. The water of condensation drains from the rear header l5 of each series ot' steam pipes 12 by means of the drain pipe 1T before described. Attention is directedyto the fact that the 'water of condensation passing from each feed or supply pipe 18 to the lower portion of the connected series ot' pipes 12 heatsv the lower-most pipes ot' said series and the heat rising from said are used, the lower ends.

g?, l eenen pipes heats the pipes 12 above the same. The uppermost pipes of ich series being thus heated, those pipes nearest to the lumber supported above the dry steam which is drying apparatus of the type to which the present invention relates. The temperature in the kiln may be increased by reason of the above advantageous arrangements of steam pipes to a high degree and this is of great importance in drying kilns of this type. Should it be desired to dry cypress or hard Woods one or more of the valves 19 may be operated Aso as to eut ott' the supply of steam to the connected series of steam pipes 1.9. until the desired temperature is secured. ln this manner all kinds of lumber may be dried as will be readily appreciated.

Having thus described the inventi0n,what is claimed as new, is:

A. dry lriln ot the class described embody ing side, front, and rear walls7 rails extend- 'inglongitudinally of the liln but supported in the iront and rear walls thereof, vertical :l-beams arranged at intervals in the length ot the kiln and supporting upon the upper ends thereof the said rails. cross bars having opposite ends seated in the side `walls of the kiln and secured intermediate ot' their ends to the -beams, supporting members connected at their upper ends with the cross bars, heating apparatus carriedby said supportingmembers, and brace means connecting the -beams substantially as described.

In testimony ivhereof l alix my'signature in presence of two witnesses.

THOMAS C. MORRIS.

lVitnesses:

E. B. Kinswolrrisr, G. D, M. Hnnnnasm' series Will contain only of vgreat advantage in. 

